Surain Ezekiel, off-road Electric Bike from Belgium

A friend just sent me a link to this new E-bike, from Surain in Belgium (near the northern border of France). Sooner or later, this interesting off-road E-bike will be compared to a Stealth Fighter, and we will be looking for information about the details to see how it stacks up. These guys are familiar with the level of performance needed to make an E-bike significant, because they also make an electric motorcycle.

They are off to a good start by using 72V. It is the amps that generates the most heat in the motor and controller, so engineering-wise, it is always good to start out with the most volts that will work for your design. The controller is a significant 18-FET, so although Surain is claiming it can handle 60A peaks, the majority of the time you will be using fewer amps than that, so a large 18-FET should run fairly cool enough to avoid overheating in most conditions.

They are drawing 60A peaks from a 15-Ah battery, and this is the only thing that might cause me some concern. They don’t list the battery chemistry or cell type…only that the cells are from Panasonic (which is at least one good sign). It might be using high current NON-LiPo chemistries and cells, and I hope that their battery uses one of those.

An interesting feature that I noticed is that they list their frame as being made from a very strong 7075-T6 Aluminum alloy, But a close inspection of the pictures show that there seems to be very few welds. The separate pieces that make up the custom frame appear to be made from water-jetted aluminum plates, and then bolted or riveted together.

The Surain Ezekiel from Belgium with Benjamin Surain, the president of this company.

Here is a pic of a high-concept show EV from Surain, named the “Eol“. The drop-outs are steel, and the rest of the frame is aluminum, using a water-jetted plates and bolts construction. This might be the “scooter” that their website states they will have in production soon?…

Grew up in Los Angeles California, US Navy submarine mechanic from 1977-81/SanDiego. Hydraulic mechanic in the 1980's/Los Angeles. Heavy equipment operator in the 1990's/traveled to various locations. Dump truck driver in the 2000's/SW Utah. Currently a water plant operator since 2010/NW Kansas